278960 has 40 divisors (see below), whose sum is σ = 709776. Its totient is φ = 101120.

The previous prime is 278947. The next prime is 278981. The reversal of 278960 is 69872.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

278960 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 722 + ... + 1038.

2²⁷⁸⁹⁶⁰ is an apocalyptic number.

278960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 278960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (354888).

278960 is an abundant number, since it is smaller than the sum of its proper divisors (430816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

278960 is a wasteful number, since it uses less digits than its factorization.

278960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341 (or 335 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 278960 is about 528.1666403703. The cubic root of 278960 is about 65.3402278809.

The spelling of 278960 in words is "two hundred seventy-eight thousand, nine hundred sixty".